Lambton is a neighbourhood in the city of Toronto, Ontario, Canada. It is situated on the east bank of the Humber River north and south of Dundas Street West. It is bounded on the north by Black Creek, on the east by Jane Street and on the south by St. Mark's Road. The area west of Gooch Avenue and south of Dundas Street West is also known as "Warren Park", the name of the housing sub-division built in the 1950s. The portion south of Dundas Street West is within the 'Lambton Baby Point' neighbourhood as defined by the City of Toronto.

John George Lambton, 1st Earl of Durham,, also known as "Radical Jack" and commonly referred to in Canadian history texts simply as Lord Durham, was a British Whig statesman, colonial administrator, Governor General and high commissioner of British North America. A leading reformer, Durham played a major role in the passage of the Reform Bill of 1832. He later served as ambassador to Russia. He was a founding member and chairman of the New Zealand Company that played a key role in the colonisation of New Zealand. George Woodcock says that he was, "Proud, wayward, immensely rich, with romantic good looks and an explosive temper." He was one of those "natural rebels who turn their rebellious energies to constructive purposes. Both at home and abroad he became a powerful exponent of the early nineteenth-century liberal spirit."